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NANOSECOND PULSE GENERATOR
NPG-10/100k (NPG-10/100kN)
USER MANUAL
v. 1.0
© 2021 Megaimpulse Ltd.
Copyright © 2021 MEGAIMPULSE Ltd. All Rights Reserved.
MEGAIMPULSE LTD. PROVIDES THIS MANUAL "AS IS" WITHOUT WARRANTY OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR
CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
SHALL MEGAIMPULSE LTD., ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES
FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS
AND THE LIKE), EVEN IF MEGAIMPULSE LTD. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT. SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATION ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND
SHOULD NOT BE CONSTRUED AS A COMMITMENT BY MEGAIMPULSE LTD. MEGAIMPULSE LTD.
ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY
APPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT. Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights of
their respective companies, and are used only for identification or explanation and to the owners' benefit, without
intent to infringe.
Megaimpulse Ltd. contact information
Mail address: 26 Polytechnicheskaya str., St. Petersburg, 194021 Russia
www: http://www.megaimpulse.com
e-mail: [email protected]
fax: +7-812-297-3145
CONTENTS
Package content ........................................................................................... 2
General view of NPG-10/100k nanosecond pulse generator ........................... 2
Safety manual .............................................................................................. 3
Technical specification ................................................................................. 4
Front and rear panels view ............................................................................ 5
Operation description ................................................................................... 6
Front panel in detail ...................................................................................... 7
Putting the generator into operation .............................................................. 9
Triggering of the generator ........................................................................... 11
Output SYNC pulse ...................................................................................... 17
Overheat mode ............................................................................................. 18
Fuse replacement .......................................................................................... 19
Warranty ...................................................................................................... 20
Appendix A.
List of preset repetition rates and number of pulses within a burst ........... 21
User manual of NPG-10/100k (NPG-10/100kN) 1
PACKAGE CONTENT
Please check the package for the following items:
NPG-10/100k (NPG-10/100kN) nanosecond pulse generator (hereinafter
"generator")
Power supply cable
High voltage output coaxial cable User manual
Fig.1. General view of NPG-10/100k (NPG-10/100kN) nanosecond pulse
generator.
MEGAIMPULSE LTD. 2
SAFETY MANUAL
Electrical safety
NPG-10/100k (NPG-10/100kN) pulse generator is high voltage equipment.
Please be very careful and operate by qualified personnel only.
There is a risk of electric shock, strong electromagnetic interference,
damage to the generator or other electronic equipment in case of improper use.
Do not switch on the generator without proper grounding. The grounding
cable should be connected to the terminal on the rear panel of the generator
or a three-terminal power supply outlet with ground contact should be used.
It is strongly prohibited to switch on the generator without an output
coaxial cable. The electrical arcing on the open coaxial connector will
damage the generator. Please use our special high voltage coaxial
connector and cable only. Standard N-, HN- or 7/3-types connectors are not
suitable. High voltage connectors should be clean and dry, free from dust,
dirt and, any obstacles. The mating Teflon parts are lubricated by silicone
grease.
When adding or removing the generator to or from the system, ensure that
the power supply ON/OFF switch is turned off and/or power supply cable
is unplugged before the output cable is connected or disconnected.
Please connect or disconnect any equipment, toggle the generator from
internal to external triggering mode or vice versa while the generator is in
high voltage OFF state only by HV ON/OFF switch.
Operation safety
Please read this manual before installing and using the generator.
Before using the product, make sure that all cables are applicable and not
damaged.
To avoid a short circuit, please keep metal parts like clips, screws, and staples away from the generator.
The generator is designed to work in normal laboratory conditions. Avoid
dust, humidity, and temperature extremes. Do not place the generator in
any place where it may become wet.
Place the generator on a stable surface.
If you encounter any technical problem with the generator, please contact
Megaimpulse Ltd. Do not try to repair the generator by yourself.
User manual of NPG-10/100k (NPG-10/100kN) 3
TECHNICAL SPECIFICATION OF NPG-10/100k (NPG-10/100kN)
NANOSECOND PULSE GENERATOR
Output pulse amplitude
(typical)
smooth regulated within 7.0 kV ... 11.0 kV
(50 steps) on matched 75 Ohm load;
up to 22kV on open cable and discharge reactor
Output impedance 75 Ohm
Output connector special HV coaxial type connector
Output cable coaxial cable with 75 Ohm impedance,
outer diameter 9.6 mm
Pulse polarity positive (NPG-10/100k)
negative (NPG-10/100kN)
Pulse rise time < 4 ns (fast part of output pulse)
Pulse width (FWHM) 7 ns
Pulse energy regulated within 5 mJ ... 10 mJ (50 steps)
Peak pulse power up to 1.6 MW
Operation modes continuous, burst, single pulse modes;
internal and external triggering
Continuous mode repetition
rates from 1 Hz to 10 kHz (internal triggering)
from single pulse to 10 kHz (external triggering)
Burst mode repetition rates;
number of pulses in burst up to 100 kHz; up to 10000 pulses within a burst
or each one second interval
External triggering
(SYNC IN) BNC connector, +2.4V ... +5V amplitude
Internal generator delay ~ 1 μs
Jitter RMS (typical) 1 ns
SYNC OUT BNC connector, TTL level
Power supply AC 110-230V, 50-60 Hz
Size 248 х 90 х 250 mm3
Weight (with cables) 6 kg
MEGAIMPULSE LTD. 4
FRONT VIEW
2 3 4 5
6 7 8 9 10 REAR VIEW
11 12 13
1 – High voltage output coaxial connector
2 – High voltage ON/OFF push button with ON state LED indicator 3 – Internal/external triggering push button with LED indicator
4 – Frequency and number of pulses in burst 4-digit display
5 – Frequency and number of pulses in burst regulation knob with push button
6 – BNC type SYNC OUT connector
7 – BNC type SYNC IN connector
8 – Overheat LED indicator
9 – Output pulse energy 2-digit display
10 – Output pulse energy regulation knob with push button
11 – Power supply ON/OFF switch
12 – Power supply connector and fuse holder
13 – Fans
14 – Ground terminal
14
User manual of NPG-10/100k (NPG-10/100kN) 5
1
OPERATION DESCRIPTION
NPG-10/100k generator is a powerful and smart device. In spite of its compact
size and small number of control elements it implements a lot of operation
regimes and high output power according to the user demands. Please read this
manual carefully to be familiar with the basic operation principles.
The generator has open and short load protection as well as overheating
protection. However, it is strongly prohibited to switch on the generator
without output cable or use less than 3 meters length output cable.
The generator can operate in a single pulse, continuous and burst operation modes, as well as internal or external triggering. The generator’s control system provides
quartz stabilized triggering pulses in continuous and burst operation modes and
prevents improper triggering in case of external triggering mode. The complete list
of the preset frequencies and the preset number of pulses in a burst are shown in
Appendix A.
In all operation modes, the minimum pulse-to-pulse interval is limited to
9.9 µs, which corresponds to 101 kHz repetition rate; the maximum
number of pulses within any one-second interval is limited to 10000.
Therefore, the maximum operation frequency in continuous mode is 10
kHz. Higher repetition rates are available in burst mode only.
The following operation parameters can be set by the front panel controls: - FREQUENCY from 1 Hz to 101 kHz, the default value is 100 Hz;
- NUMBER OF PULSES in the burst (within one-second interval) from 1
to 10000, the default value is 1000;
- Output PULSE ENERGY from 50% to 99%, the default value is 75%.
If the currently set repetition rate in Hz is lower than or equal to the set number of
pulses (within one-second interval) then the generator operates in continuous
mode, otherwise, it switches into burst mode automatically. The period of bursts is
fixed to one second. So, FREQUENCY parameter sets the time interval between
pulses, while NUMBER OF PULSES sets the burst length or number of pulses
followed by a pause up to the end of the one-second interval.
The FREQUENCY and NUMBER OF PULSES parameters work as the
limits for the external triggering pulses. Therefore, FREQUENCY sets the
maximum allowable external pulses frequency (minimum interval between
pulses) and NUMBER OF PULSES sets the maximum burst length or the
maximum number of pulses within each one-second interval. By the way,
the generator’s control system prevents overloading and damage to the
generator in case of improper external triggering.
MEGAIMPULSE LTD. 6
FRONT PANEL IN DETAIL
Special type coaxial connector suitable for HV
nanosecond pulses feeding. Please attach the output
HV cable firmly before turn-on the generator. It is
very important to keep HV connectors clean to prevent
unwanted arcing and glow discharge inside the mating
pair. If necessary, please clean the connectors with
cotton bud and alcohol, and then apply a drop of pure
silicone grease before mating the connectors. Grease
fills air gaps and eliminates possible discharge inside.
Non-latching push button, which toggles HV system
ON and OFF. Red LED on the button lights on when
HV system is activated and ready for triggering by
internal or external triggering pulse. HV sets to OFF
state when the generator is powered on, and
automatically switches to OFF state in case of
overheating or TRIGGERING TEST mode activation.
Latching push button, which toggles internal or
external triggering modes. LED lights off if the button
is pushed and no external triggering pulses are
applied. LED blinks with 1 Hz frequency in case of
successful external triggering. Internal triggering
mode is activated in the pushing back state. Red LED on the button lights on and indicates immediate
triggering when HV system is activated by HV
ON/OFF button.
Four-digit LED display and control knob with push-
button, which set FREQUENCY and NUMBER OF
PULSES parameters. The FREQUENCY is indicated
in kHz with a decimal dot. For example, 1 Hz is
indicated as 0.001; 100 kHz is indicated as 100.0.
Please push the control knob until it clicks and hold it
for one second to switch into NUMBER OF PULSES
mode. LED display would blink and indicate
NUMBER OF PULSES. For example, 1 pulse is
indicated as 0001, 10000 pulses are indicated in
thousands as 010.0. Please push the control knob and
hold for one second again to switch back into
FREQUENCY mode. The complete lists of preset
frequencies and the number of pulses are shown in
Appendix A.
User manual of NPG-10/100k (NPG-10/100kN) 7
Two-digit LED display and control knob with push-
button, which set PULSE ENERGY parameter. The
energy can be adjusted from 50% to 99% with 1%
step. LED display lights on constantly in idle or
continuous operation modes. It blinks in burst mode,
the duration of LED light on and off states
corresponds to the duty cycle. Please push the control
knob until it clicks and hold it for one second to
switch into triggering TEST mode. HV ON/OFF push
button is blocked in this mode. LED display shows
00, which means zero output power. Triggering sequence from the internal or external source goes to
SYNC OUT connector. This mode allows to test the
triggering and see the exact triggering sequence
without applying HV pulses to the load. Please push
the control knob and hold for one second again to
switch back into PULSE ENERGY mode.
If the internal temperature exceeds a safe level, then OVERHEAT LED lights on, and the generator stops
the operation. It may occur in case of high ambient
temperature / insufficient cooling or after long-time
operation at high amplitude and high repetition rate.
HV ON/OFF button is blocked while the generator is
overheated. Please stay the generator in idle mode, and
allow cooling by the fans for several minutes. The
generator will return to normal operation
automatically when the temperature decreases; press
HV ON again to continue the operation.
BNC input connector for external triggering pulses.
The amplitude should be +2.4V … +5V, the nominal
pulse width is 1 µs. External synchronization mode is activated by pressing INT/EXT green push button.
BNC output connector for SYNC OUT pulses. The
front edge of SYNC OUT pulse precedes HV output
pulse by ~1 µs. SYNC OUT pulse duration is 400 ns,
the amplitude is 3V@50Ω.
MEGAIMPULSE LTD. 8
PUTTING THE GENERATOR INTO OPERATION
Please strictly follow the described steps. It helps to prevent damage to the
generator, other equipment, and personnel injury.
Step 1.
Unpack the generator and check the presence into the package of the following
items:
- NPG-10/100k (NPG-10/100kN) generator,
- power supply cable,
- output 75 Ohm coaxial cable.
Step 2.
Set up the generator. Ground it obligatory by connecting ground cable to terminal
on the rear panel (14) or use three-terminal power supply outlet with grounding contact.
Step 3.
Check the output coaxial female connector on the front panel of the generator and
co-pair male connector on the cable. Both connectors should be clean, free from
dust, dirt, and obstacles. Clean the connectors with alcohol and/or cotton bud if
necessary. After cleaning, please apply a drop of pure silicone grease before
mating the connectors. Grease fills the air gap between co-pair connectors and
eliminates possible glow discharge inside.
Attach the cable connector to the generator front panel connector (1). The tight
and firm contact of the connectors is important for the safe operation of the
generator. Even a small air gap between the connectors may result in a glow discharge, arcing, and damage to the generator and the cable.
The following procedure is recommended for obtaining good and tight contact:
1. Align both connectors.
2. Hold the generator by one hand to prevent moving and press the cable
connector by another hand toward the generator connector.
3. Screw the cable connector nut by hand, usually one or two turns. Do not
rotate the cable connector body.
4. Press the cable connector toward the generator connector again.
5. Again, screw the cable connector nut one or two turns.
6. Repeat steps 4 and 5 up to tight contact. Finally, screw the cable
connector nut firmly with both hands. After the first testing of the generator, it is highly recommended to check whether
the tight contact of the connectors is obtained. Unscrew the cable connector. It
should be no ozone or burnt smell from the connectors or burnt traces.
User manual of NPG-10/100k (NPG-10/100kN) 9
Do not disconnect and connect the high voltage connectors many times to prevent
them from wearing and contamination. Silicone grease is already applied to both
connectors at the factory. It remains between the mating connectors for a very
long time and prevents discharge inside.
Step 4.
Connect another side of the coaxial cable to the load. The Teflon cone insulator is
installed on the cable end to prevent the barrier discharge between the central wire
and the cable braid across the cable solid polyethylene insulator (See Fig.2). You
may use additional wires for connection to the load. Solder the high voltage load contact to the central cable wire and screw/solder ground load contact to the
ground cable clamp. Please keep the length of the wires between the coaxial cable
and the load as short as possible.
More than 10 cm additional wires between the load and the coaxial cable
result in excessive stray inductance and significantly decrease the pulse
amplitude on the load.
Fig.2. Teflon cone insulator on the cable end.
MEGAIMPULSE LTD. 10
The length of the output coaxial cable is 3 meters. Using the shorter coaxial
cable may result in damage to the generator.
Step 5.
Connect power supply cable to the wall power outlet.
Switch on the generator by the toggle power switch on the rear panel. The internal
fans should start to rotate.
Step 6.
Push back INT/EXT push button (if it is pressed) in INT position. Red LED on the button should light on indicating the internal triggering mode.
Set the required frequency, the number of pulses, and the energy by the knobs. It
is clever to start the experiments with low operation parameters, which helps to
prevent possible damage to the equipment in case of any error or improper using.
Press HV ON/OFF push button. Red LED on the button would light on, and
output HV pulses would go to the output and load. Increase the amplitude and
frequency by corresponding knobs as necessary.
Step 7.
Always stop the operation of the generator by HV ON/OFF switch. After that, you
can switch off the generator by the power switch. After a long time of operation at high pulse amplitude and frequency, please allow fans to rotate several minutes in
idle mode for cooling.
TRIGGERING OF THE GENERATOR
The generator can operate in internal and external triggering operation modes.
Internal triggering
The internal triggering mode is set when the INT/EXT button is pushed back. Red
LED on the button continuously lights on, indicating the internal triggering mode. The external triggering pulse generator is not required, and continuous or burst
operation mode can be implemented. Output pulses repetition rate can be adjusted
by FREQUENCY regulation knob within 1 Hz … 101 kHz. Press this knob and
hold it for one second for entering into NUMBER-OF-PULSES adjusting regime.
The four-digit indicator would start to flash. Set the required number of pulses in
the burst within 1 to 10000. Press and hold the knob for one second again to return
back to FREQUENCY adjusting regime. The generator operates in burst mode if
User manual of NPG-10/100k (NPG-10/100kN) 11
the set number of pulses is less than the set frequency, otherwise, it is in
continuous mode. The complete lists of preset frequencies and number of pulses in
the burst are presented in Appendix A.
External triggering
External triggering mode is set by pressing INT/EXT latching push button. Red
LED on the button lights off, indicating the external triggering mode. The
generator is triggered by the rising edge of the external triggering pulse applied to
BNC type SYNC IN connector. Please use a coaxial cable and triggering
generator with 50 Ohm impedances. Recommended triggering pulse amplitude and width are +5 V and 1 µs. Red LED on INT/EXT button blinks with 1 Hz
frequency in case of successful triggering. The delay between the triggering pulse
front and the output pulse (internal generator delay) is about 1 µs. Typical jitter
(RMS) is 1 ns.
The maximum allowable pulse repetition rate and the number of pulses
within the burst are limited by internally set FREQUENCY and NUMBER
OF PULSES parameters. Please set the required values by FREQUENCY
knob.
The generator can operate in burst enable mode also. Long triggering pulse generates a burst of pulses with repetition rate set by FREQUENCY parameter.
The external triggering pulse fed to SYNC IN connector works as enable signal in
this case. HV pulses are generated continuously until the level of the triggering
pulse becomes low.
The single pulse operation is available in the case of external triggering mode
only.
Fig.3 – Fig.10 show the various bursts of the pulses formed in the external
triggering mode.
Triggering test mode
Push and hold for one second the PULSE ENERGY knob to switch into
TRIGGERING TEST mode. HV ON/OFF push button is blocked in this mode,
and HV output pulses are not generated. LED display shows 00, which means
zero output power. Triggering sequence from internal and/or external source goes
to SYNC OUT connector and can be registered by the external oscilloscope. This
mode is useful to check the triggering sequence, especially in complicated operation regimes. Push and hold for one second the PULSE ENERGY knob one
more time for returning back to the normal operation mode.
MEGAIMPULSE LTD. 12
Fig.3. Internal triggering, burst mode. FREQUENCY sets 100 kHz repetition rate,
NUMBER OF PULSES sets 7 pulses burst length. CH2 (green line) shows
the output pulses on SYNC OUT connector.
Fig.4. Internal triggering, burst mode. FREQUENCY sets 100 kHz repetition rate,
NUMBER OF PULSES sets 60 pulses burst length. CH2 (green line)
shows the output pulses on SYNC OUT connector.
User manual of NPG-10/100k (NPG-10/100kN) 13
Fig.5. External triggering mode. The external triggering pulses define the
repetition rate. CH2 (green line) shows SYNC OUT pulses. CH3 (blue
line) shows the triggering pulses fed to SYNC IN connector.
Fig.6. External triggering, burst mode. External triggering pulses (CH3, blue line)
set 60 kHz repetition rate and 2 pulses in a burst. CH2 (green line) shows
SYNC OUT pulses.
MEGAIMPULSE LTD. 14 MEGAIMPULSE LTD. 14
Fig.7. External triggering, burst enable mode. FREQUENCY parameter sets
50 kHz repetition rate within a burst, SYNC IN triggering pulse duration
(CH3, blue line) defines the burst length of 25 pulses.
Fig.8. External triggering, burst enable mode. Two SYNC IN pulses (CH3, blue
line) define two bursts of 10 pulses each. FREQUENCY parameter sets
100 kHz frequency within the bursts.
User manual of NPG-10/100k (NPG-10/100kN) 15
Fig.9. External triggering, burst enable mode. The NUMBER OF PULSES
parameter is set to 8, limits the total number of pulses, and reduces the
length of the second burst to 3 in spite of a longer external triggering pulse.
Fig.10. External triggering, burst enable mode. The pairs of SYNC IN pulses
(CH3, blue line) set the pair bursts of output pulses (CH2, green line).
MEGAIMPULSE LTD. 16
SYNC OUT PULSE
NPG-10/100k (NPG-10/100kN) generator has BNC type output connector for
SYNC OUT pulses. The SYNC OUT pulse amplitude is 3 V on 50 Ohm load and
5 V on high impedance load. The pulse width is 400 ns.
The oscillogram of SYNC OUT pulse (Channel 2, cyan line) is shown in Fig.11.
Channel 1 is the output HV pulse, which is a source of strong interference.
Therefore, one can see the noise on the oscillogram at the moment of the output
pulse generation. The delay between the rising edge of the triggering pulse and the
output pulse is about 1 µs.
Fig.11. Oscillogram of SYNC OUT pulse (Channel 2, cyan line). The pulse
amplitude is 3 V on 50 Ohm load and 5 V on high impedance load. The pulse
width is 400 ns. The delay between the rising edge of the triggering pulse and the
high voltage output pulse is about 1 µs.
User manual of NPG-10/100k (NPG-10/100kN) 17
OVERHEAT MODE
NPG-10/100k (NPG-10/100kN) pulse generator has overheating protection
system. The long-time operation with high amplitude and high repetition rate
and/or at high ambient temperature may lead to the overheating of the generator.
OVERHEAT LED lights on in this case, and the generator stops the operation.
HV ON/OFF push button is turned off automatically and disabled. Please stay the
generator in idle mode for several minutes, and allow the fans to cool it.
OVERHEAT LED would light off when the temperature decreases and returns
within the safe range. The generator is ready for the operation again.
MEGAIMPULSE LTD. 18
FUSE REPLACEMENT
The type of fuse is 6A/250V slow switching, cylindrical glass 5mm X 20mm.
The fuse holder is located in the three-terminal power supply connector. Please
use a flat screwdriver or another suitable tool to remove the fuse holder (see
Fig.12.).
Fig.12. Removing the fuse holder with a flat screwdriver.
There are two fuses in the fuse holder, including one spare (see Fig.13).
Fig.13. Two fuses in the fuse holder, including one spare (upper in the figure).
User manual of NPG-10/100k (NPG-10/100kN) 19
WARRANTY
Please see your sales agreement to determine the warranty period and condition.
The generator has warranty seals on the front and rear panels (see Fig.14.).
Removing the warranty seals terminates the warranty.
Fig.14. Warranty seals on the front and rear panels.
MEGAIMPULSE LTD. 20
Appendix A.
List of preset repetition rates. 15 kHz and above are available in burst operation
mode only.
Frequency 4 digits display Frequency 4 digits display
1 Hz 0.001 2.5 kHz 002.5
2 Hz 0.002 3 kHz 003.0
3 Hz 0.003 3.5 kHz 003.5
4 Hz 0.004 4 kHz 004.0
5 Hz 0.005 4.5 kHz 004.5
6 Hz 0.006 5 kHz 005.0
7 Hz 0.007 5.5 kHz 005.5
8 Hz 0.008 6 kHz 006.0
9 Hz 0.009 6.5 kHz 006.5
10 Hz 0.010 7 kHz 007.0
20 Hz 0.020 7.5 kHz 007.5
30 Hz 0.030 8 kHz 008.0
40 Hz 0.040 8.5 kHz 008.5
50 Hz 0.050 9 kHz 009.0
60 Hz 0.060 9.5 kHz 009.5
70 Hz 0.070 10 kHz 010.0
80 Hz 0.080 15 kHz **) 015.0
90 Hz 0.090 20 kHz 020.0
100 Hz *) 0.100 25 kHz 025.0
200 Hz 0.200 30 kHz 030.0
300 Hz 0.300 35 kHz 035.0
400 Hz 0.400 40 kHz 040.0
500 Hz 0.500 45 kHz 045.0
600 Hz 0.600 50 kHz 050.0
700 Hz 0.700 60 kHz 060.0
800 Hz 0.800 70 kHz 070.0
900 Hz 0.900 80 kHz 080.0
1 kHz 001.0 90 kHz 090.0
1.5 kHz 001.5 100 kHz 100.0
2 kHz 002.0 101 kHz ***) 101.0
*) the default value is 100 Hz, which is set after power on the generator
**) 15 kHz and more are available in the burst mode only
***) please set 101 kHz internal frequency if you want to operate in external
triggering mode with up to 100 kHz repetition rate
User manual of NPG-10/100k (NPG-10/100kN) 21
List of the preset number of pulses within a burst. 4-digit display blinks with 1 Hz
frequency while indicates the set number of pulses value.
Number of pulses 4 digits display Number of pulses 4 digits display
1 0001 600 0600
2 0002 700 0700
3 0003 800 0800
4 0004 900 0900
5 0005 1000 *) 001.0
6 0006 1500 001.5
7 0007 2000 002.0
8 0008 2500 002.5
9 0009 3000 003.0
10 0010 3500 003.5
20 0020 4000 004.0
30 0030 5000 005.0
40 0040 5000 005.0
50 0050 6000 006.0
60 0060 7000 007.0
70 0070 8000 008.0
80 0080 9000 009.0
90 0090 10000 010.0 100 0100
200 0200
300 0300
400 0400
500 0500
*) the default value is 1000 pulses, which is set after power on the generator
MEGAIMPULSE LTD. 22
